"Dr Slack" says it well, in a comment on someone else's post at Stand Down/ NoWarBlog.
"I find it endlessly puzzling that American troops are so often surprised to find resistance to their presence. What American would welcome foreign troops in their cities, no matter how bad their own government was or how many promises the alien power made to "liberate" them? And why do so many Americans deny people in other countries the right or even the possibility of feeling the same way? Of all the idiosyncrasies driving the war, this one strikes me as one of the weirdest and most destructive"